Turn on Working only (at the end of the category row) to hide channels that aren't working right now.
Channel status: WorkingNot workingCheckingCan't check (YouTube)
The channel up and down buttons on your remote change to the next or previous channel in the category you're viewing.
settings.js wasn't found or has a typo, so the guide is using its built-in settings. Check the file for a missing comma or quote.